Export Errors: Limited Export, Error line 72

I recently upgraded a client to 3.0. We’re migrating her and need to export her posts into smaller files rather than one big export. WP3 says we can do this with the new selectors within the export area of the dashboard.

When I choose “all” and everything default, it exports my file without errors, but only exports *some* of the posts — not all.

When I choose a specific category to export, all statuses, it exports the right category, though not all the posts.

When I choose a specific category and “published” as the status, it spits out the following errors:

Notice: Array to string conversion in /var/www/vhosts/clientacct/httpdocs/wp-includes/formatting.php on line 2773
Notice: Undefined variable: status in /var/www/vhosts/clientacct/httpdocs/wp-admin/includes/export.php on line 72

I really don’t know what any of that means, so I Googled it and found these instructions here: http://core.trac.wordpress.org/ticket/14026

That removed the first error, but the 2nd persists. I *really* need to get this content exported smoothly and this looks like the most ideal way.

Is this a bug?

(All the plugins have been deactivated, so I don’t believe there is any interference here.)